Samuel R. McKelvie National Forest
- Annual mean
- 9.7 °C
- Warmest month
- July
- Wettest month
- June
Review long-term climate normals including monthly temperature, precipitation, and wind profiles.
This profile presents representative monthly climate averages for Fort Pierre National Grassland based on NASA POWER measurements from 1991 to 2020. Data points cover mean, minimum, and maximum temperatures; daily precipitation rates; relative humidity; wind speeds; and average daylight hours. These values illustrate long-term atmospheric patterns at a specific coordinate and remain independent of current weather forecasts or seasonal variations across the broader region.
Average monthly minimum, mean, and maximum temperatures paired with daily precipitation rates
Compare average temperature bounds, daily precipitation rates, wind speed, relative humidity, and daylight hours across the calendar year.
| Mean temperature | Precipitation | Humidity | Wind speed | Daylight | |
|---|---|---|---|---|---|
| January | -5.7 °C-21.4° to 10.2° | 0.4 mm/day | 78.8% | 5.1 m/s | 9.1 hours |
| February | -3.5 °C-18.3° to 15° | 0.6 mm/day | 73.6% | 5.1 m/s | 10.2 hours |
| March | 2.4 °C-13.1° to 22.8° | 0.8 mm/day | 67.2% | 5.4 m/s | 11.7 hours |
| April | 8.3 °C-6.2° to 28.4° | 2.1 mm/day | 62.9% | 5.5 m/s | 13.3 hours |
| May | 15.2 °C0.6° to 33° | 2.8 mm/day | 61.5% | 5.2 m/s | 14.6 hours |
| June | 21.3 °C8.7° to 36.6° | 3.2 mm/day | 62.1% | 4.8 m/s | 15.3 hours |
| July | 25.3 °C12.6° to 40.4° | 2.2 mm/day | 56.1% | 4.4 m/s | 14.9 hours |
| August | 23.9 °C11.4° to 38.9° | 2 mm/day | 57.2% | 4.5 m/s | 13.8 hours |
| September | 18.3 °C3.8° to 36° | 1.6 mm/day | 57.1% | 5 m/s | 12.3 hours |
| October | 9.4 °C-5.2° to 28.6° | 1.4 mm/day | 64.2% | 5.2 m/s | 10.7 hours |
| November | 1.5 °C-10.6° to 18.7° | 0.6 mm/day | 72.5% | 5 m/s | 9.4 hours |
| December | -4.2 °C-17.9° to 9.9° | 0.4 mm/day | 79% | 4.9 m/s | 8.7 hours |
Comparing long term monthly averages for temperature, precipitation, humidity, wind, and daylight duration.
Interactive climate map
Visit the MoriAtlas climate map to compare long-term monthly temperature and precipitation metrics across national parks. This visual interface helps you understand seasonal variations at specific protected area coordinates to deepen your knowledge of global park geography and environmental characteristics.
Examine long-term meteorological variations, annual temperatures, and precipitation across diverse regional landscapes.



Continue your regional discovery by analyzing the unique terrain and conservation layout of Fort Pierre National Grassland. MoriAtlas provides detailed context on the physical character, ecosystem composition, and vast prairie horizon of this essential South Dakota protected area.